We recommend checking out our discussion threads on the Dorrough 21A Vertical Analog Loudness Meter 21-A,
which address similar problems with connecting and setting up Metering Dorrough.

User manual for the Dorrough 21A Vertical Analog Loudness Meter 21-A

The user manual for the Dorrough 21A Vertical Analog Loudness Meter 21-A provides
necessary instructions for the proper use of the product Pro Audio - General Accessories - Metering.

The Dorrough 21A Vertical Analog Loudness Meter is a straight line version of Dorrough's standard 40A loudness monitor. The 21A requires rack mounting and needs an external power supply. It also comes in a handy vertical orientation.

If you own a Dorrough metering and have a user manual in electronic form,
you can upload it to this website using the link on the right side of the screen.

You can upload and download the manual for the Dorrough 21A Vertical Analog Loudness Meter 21-A in the following formats:

The user manual for the Dorrough 21A Vertical Analog Loudness Meter 21-A can be downloaded in .pdf
format if it did not come with your new metering, although the seller is
required to supply one. It is also quite common that customers throw out
the user manual with the box, or put the CD away somewhere and then can’t find it.
That’s why we and other Dorrough users keep a unique electronic library
for Dorrough meterings,
where you can use our link to download the user manual for the Dorrough 21A Vertical Analog Loudness Meter 21-A.

The user manual lists all of the functions of the Dorrough 21A Vertical Analog Loudness Meter 21-A,
all the basic and advanced features and tells you how to use the metering.
The manual also provides troubleshooting for common problems. Even greater
detail is provided by the service manual, which is not typically shipped with the product,
but which can often be downloaded from Dorrough service.

If you want to help expand our database, you can upload a link to this website
to download a user manual or service manual, ideally in .pdf format. These pages
are created by you – users of the Dorrough 21A Vertical Analog Loudness Meter 21-A. User manuals are also
available on the Dorrough website under Pro Audio - General Accessories - Metering.
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